package com.atguigu.lease.web.admin.service.impl;

import com.atguigu.lease.common.constants.RedisConstant;
import com.atguigu.lease.common.jwt.JwtUtil;
import com.atguigu.lease.common.result.ResultCodeEnum;
import com.atguigu.lease.common.springmvc.LeaseException;
import com.atguigu.lease.model.entity.SystemUser;
import com.atguigu.lease.model.enums.BaseStatus;
import com.atguigu.lease.web.admin.service.LoginService;
import com.atguigu.lease.web.admin.service.SystemUserService;
import com.atguigu.lease.web.admin.vo.login.CaptchaVo;
import com.atguigu.lease.web.admin.vo.login.LoginVo;
import com.atguigu.lease.web.admin.vo.system.user.SystemUserInfoVo;
import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.wf.captcha.SpecCaptcha;
import com.wf.captcha.base.Captcha;
import io.jsonwebtoken.Claims;
import org.apache.commons.codec.digest.DigestUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.stereotype.Service;
import org.springframework.util.ObjectUtils;

import java.util.UUID;
import java.util.concurrent.TimeUnit;

@Service
public class LoginServiceImpl implements LoginService {

    @Autowired
    private RedisTemplate<String,Object> redisTemplate;
    @Autowired
    private SystemUserService systemUserService;
    @Override
    public CaptchaVo sendCode() {
        //生成验证码
        SpecCaptcha specCaptcha = new SpecCaptcha(138, 48, 4);
        specCaptcha.setCharType(Captcha.TYPE_DEFAULT);// 字母数字混合
        String imagBase64 = specCaptcha.toBase64();//验证码图片
        String code = specCaptcha.text();//验证码的字符串

        //存储验证码到Redis
        String uuidKey = RedisConstant.ADMIN_LOGIN_PREFIX + UUID.randomUUID().toString().replaceAll("-","");
        redisTemplate.opsForValue().set(uuidKey,code,RedisConstant.ADMIN_LOGIN_CAPTCHA_TTL_SEC, TimeUnit.SECONDS);

        //创建CaptchaVo对象,封装验证码图片和uuid
        CaptchaVo captchaVo = new CaptchaVo(imagBase64, uuidKey);
        return captchaVo;
    }

    @Override
    public String login(LoginVo loginVo) {
        //校验验证码是否过期
        String redisCode = (String) redisTemplate.opsForValue().get(loginVo.getCaptchaKey());
        if (ObjectUtils.isEmpty(redisCode)){
            //空抛异常
            throw new LeaseException(ResultCodeEnum.ADMIN_CAPTCHA_CODE_EXPIRED);
        }
        //校验验证码是否正确
        if (!redisCode.equalsIgnoreCase(loginVo.getCaptchaCode())){
            //错误抛异常
            throw new LeaseException(ResultCodeEnum.ADMIN_CAPTCHA_CODE_ERROR);
        }
        //校验账号是否存在
        //先查,不存在抛异常
        LambdaQueryWrapper<SystemUser>systemUserLambdaQueryWrapper=new LambdaQueryWrapper<>();
        systemUserLambdaQueryWrapper.eq(SystemUser::getUsername,loginVo.getUsername());
        SystemUser systemUser = systemUserService.getOne(systemUserLambdaQueryWrapper);

        if (systemUser==null){
            throw new LeaseException(ResultCodeEnum.ADMIN_ACCOUNT_NOT_EXIST_ERROR);
        }
        //校验密码是否正确
        String password = DigestUtils.md5Hex(loginVo.getPassword());
        if (!systemUser.getPassword().equals(password)){
            throw new LeaseException(ResultCodeEnum.ADMIN_ACCOUNT_ERROR);
        }
        //校验账号状态
        if (systemUser.getStatus() == BaseStatus.DISABLE){
            throw new LeaseException(ResultCodeEnum.ADMIN_ACCOUNT_DISABLED_ERROR);
        }
        //创建发放token
        String token = JwtUtil.createToken(systemUser.getId(), systemUser.getUsername());
        return token;
    }

    @Override
    public SystemUserInfoVo customInfo(String accessToken) {
        //1. 解析token获取 claims
        Claims claims = JwtUtil.parseToken(accessToken);
        //2. claims获取userId
        Integer userId = (Integer) claims.get("userId");
        //3. userId查询用数据
        SystemUser systemUser = systemUserService.getById(userId);
        //4. SystemUserInfoVo
        SystemUserInfoVo systemUserInfoVo = new SystemUserInfoVo();
        systemUserInfoVo.setName(systemUser.getName());
        systemUserInfoVo.setAvatarUrl(systemUser.getAvatarUrl());
        return systemUserInfoVo;
    }

}
